This is a beautiful, mysterious cake. Part of a vanilla batter is spread in the pan, and then chocolate is poured over that. The two batters are not marbled or swirled, the technique we use with my Classic Two-Layer Marble Cake, Redux. During baking, the vanilla batter bakes around the chocolate batter, which is only revealed when you cut into the cake. You can find malted milk powder in supermarkets. This recipe is adapted from Greg Patent.CAKE RECIPE HELP